Introduction of socket welding flange

Socket welding flange(SW flange) refers to the flange which is welded at the end and outside of the pipe by inserting the end of the pipe into the step of the flange ring.There are neck and no neck.The flange with neck has good rigidity, small welding deformation and good sealing property.It can be used in pressure range of 1.0 to 10.0 MPa.Type B flange for container also belongs to socket welded flange,which is used in occasions with high sealing requirements.In design, socket welded flange can be checked according to integral flange.

ANSI B16.5 socket welding flanges

ANSI B16.5 socket welding flanges

Flange sealing surface type:

Raised face(RF),flat face(FF),tongue and groove(TG),ring type joint(RTJ),SRF and male and female(MFM).

Socket weld flange material:

Carbon steel:

ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn.

Stainless steel:

ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51 etc

Alloy steel:

ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22 etc.

Flange manufacturing standard:

ANSI/ASME B16.5,B16.47,B16.48,AWWA C207,API 6A/6B/6BX,DIN 2527,2573,2576,2631,2632,2633,2634,2635,2566,2642,EN 1092,BS 4504,JIS B2220,GOST 12820,GOST 12821,SABS 1123,AS 1219 etc.

Application scope:

Boiler pressure vessel,petroleum,chemical,shipbuilding,pharmaceutical,metallurgy,machinery,stamping elbow food and other industries.

Haihao Group supply high pressure forged flanges more than 30 years,which contain socket welding flange,weld neck flange,blind flange,threaded flange,orifice flange,reducing flange,lap joint flange,tube sheet,anchor flange and so on.If you want to know more about our flange products,please email